Groundwater Impact Assessment is an evaluation of foreseeable impacts on groundwater system, both beneficial and adverse. It is intended to help reveal mitigating measures and alternative solutions to optimize positive impacts while reducing or limiting negative impacts. In highway construction projects a consistent transportation network, through environmentally balanced development is possible only through a detailed knowledge of geology, natural resources and analysis of the land use pattern with precise database. The derogation of water sources for the creation of barriers and pathways for groundwater flow formed by foundations or ground improvement processes for highway construction in a sub watershed of Karamana river basin near Vizhinjam International Sea port area is envisaged in the present study. The study is addressed to generate a database for planning and design process based on the societal concern related to the groundwater impact of post road construction scenario. The modeling for the management of urban hydrology is based on the surface runoff, the rate of rainfall, aquifer characteristics, hydro-geological and geotechnical observations, the type of receiving environment and the applicable criteria for the receiving water course. The spatial analysis of the data generated through field survey, shows draining nature of shallow groundwater zones as indicated by 81 non-perennial wells and farm ponds within the watershed. Geotechnical and geophysical survey shows the presence of a major stratum of laterite with clayey soil at the top and weathered rock at places at the bottom in the core sections. Modeling of the groundwater flow of the region through MODFLOW shows a lesser recharge and a lesser vertical flow compared to evapotranspiration and the hydraulic conductivity respectively. Thus an action plan is proposed to be developed for the construction of link road by reviewing the existing practice of water resource utilization and also by assessing the environmental impact to the groundwater regime to improve the existing groundwater availability of region by constructing subsurface dykes, recharge ponds, elevated road above the existing ponds etc. The study was thus aimed to suggest remedial measures to nullify the impact on the groundwater ecosystem, and also to improve the present status of groundwater availability through predictive modeling.
Predictive Modeling and Groundwater Impact Assessment for a Highway Engineering Project in Vizhinjam, Kerala
₹100.00
Groundwater Impact Assessment is an evaluation of foreseeable impacts on groundwater system, both beneficial and adverse. It is intended to help reveal mitigating measures and alternative solutions to optimize positive impacts while reducing or limiting negative impacts. In highway construction projects a consistent transportation network, through environmentally balanced development is possible only through a detailed knowledge of geology, natural resources and analysis of the land use pattern with precise database. The derogation of water sources for the creation of barriers and pathways for groundwater flow formed by foundations or ground improvement processes for highway construction in a sub watershed of Karamana river basin near Vizhinjam International Sea port area is envisaged in the present study. The study is addressed to generate a database for planning and design process based on the societal concern related to the groundwater impact of post road construction scenario. The modeling for the management of urban hydrology is based on the surface runoff, the rate of rainfall, aquifer characteristics, hydro-geological and geotechnical observations, the type of receiving environment and the applicable criteria for the receiving water course. The spatial analysis of the data generated through field survey, shows draining nature of shallow groundwater zones as indicated by 81 non-perennial wells and farm ponds within the watershed. Geotechnical and geophysical survey shows the presence of a major stratum of laterite with clayey soil at the top and weathered rock at places at the bottom in the core sections. Modeling of the groundwater flow of the region through MODFLOW shows a lesser recharge and a lesser vertical flow compared to evapotranspiration and the hydraulic conductivity respectively. Thus an action plan is proposed to be developed for the construction of link road by reviewing the existing practice of water resource utilization and also by assessing the environmental impact to the groundwater regime to improve the existing groundwater availability of region by constructing subsurface dykes, recharge ponds, elevated road above the existing ponds etc. The study was thus aimed to suggest remedial measures to nullify the impact on the groundwater ecosystem, and also to improve the present status of groundwater availability through predictive modeling.
Publication Mode |
Online |
---|---|
Publication Author |
Suresh Francis, K. P. Regunatha Menon, Lal Thompson, P. Kalaiarasan |
Publication Language |
English |
Publication Type |
Conference Paper |
Publication Year |
2021 |
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